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Sun QFS File System 5.3 Configuration and Administration Guide Sun QFS and Sun Storage Archive Manager 5.3 Information Library |
General File System Configurations
Support for Paged and Direct I/O
Sun QFS File Systems Design Basics
Inode Files and File Characteristics
Specifying Disk Allocation Units
DAU Settings and File System Geometry
Dual and Single Allocation Schemes
Stripe Widths on ms File Systems
Stripe Widths on ma File Systems Not Using Striped Groups
Stripe Widths on ma File Systems Using Striped Groups
Stripe Widths on Metadata Disks
Example of a Mismatched Striped Group
Per-Logical Unit Number (LUN) Allocation Control
2. About the Master Configuration File
4. Configuring the File System
5. Configuring a Shared File System
6. Administering File System Quotas
7. Advanced File System Topics
9. Configuring WORM-FS File Systems
11. Using QFS File Systems with SANergy (SAN-QFS)
The following additional features are also supported by the Sun QFS file system:
Application programming interface (API) routines – API routines enable a program to perform various specialized functions, such as preallocating contiguous disk space or accessing a specific striped group. For more information about these routines, see intro_libsam(3) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.
Adjustable disk allocation units (DAUs) – The DAU is the basic unit of online storage. The Sun QFS file system software includes an adjustable DAU, which is useful for tuning file systems with the physical disk storage device and for eliminating the system overhead caused by read-modify-write operations. For information about adjusting the DAU size, see Specifying Disk Allocation Units.
Support for multiple striped groups – To support multiple RAID devices in a single file system, Sun QFS software supports the definition of striped groups. You can optimize disk block allocation for a striped group, thereby reducing the overhead for updating the on-disk allocation map. Users can assign a file to a striped group either through an API routine or by using the setfa(1) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.